View clinical trials related to Lung Diseases, Obstructive.
Filter by:Ventilated by a single-limb tubing with PEV caused CO2 rebreathing to COPD patients during exercise with the increasing ventilation. The aim of this study was to evaluate whether CO2 rebreathing could be avoided with the use of the dual-limb circuit, to provide a theoretical basis of more rational clinical application of NIV in the setting of increasing ventilation(eg, after exercise).
The purpose of this study is to evaluate the changes of lung function before and after the exercise in patients with chronic obstructive pulmonary disease.The assessment of quality of life is also carried out through questionnaires.
The purpose of the project is to investigate changes in the quadriceps muscle and cardiovascular regulation during exercise in relation to improved lung function after lung transplantation in patients with COPD.
Primary Objective: To investigate effects of SAR440340 (anti-interleukin-33 [IL-33] monoclonal antibody [mAb]) compared with placebo, on the annualized rate of moderate-to-severe acute exacerbations of COPD (AECOPD) over up to 52 weeks of treatment. - Moderate exacerbations were recorded by the Investigator and defined as AECOPD that require either systemic corticosteroids (such as intramuscular, intravenous or oral) and/or antibiotics. - Severe exacerbations were recorded by the Investigator and defined as AECOPD requiring hospitalization, emergency medical care visit or resulting in death. Secondary Objectives: To investigate effects of SAR440340 compared with placebo, on improving respiratory function, as assessed by pre-bronchodilator forced exploratory volume in 1 second (FEV1). To evaluate effects of SAR440340 compared with placebo, on post-bronchodilator FEV1. To evaluate effects of SAR440340 compared with placebo, on duration from baseline to first moderate or severe AECOPD event. To evaluate effects of SAR440340 compared with placebo, on safety and tolerability.
This trial will evaluate the effect of acetazolamide (375 mg per day) vs. placebo on lung water content by ultrasound at acute altitude exposure in patients with Chronic Obstructive Pulmonary Disease (COPD).
Chronic obstructive pulmonary disease (COPD) is characterized by irreversible airflow obstruction with chronic airway inflammation and emphysematous changes in the lung parenchyma, thus leading to air-trapping, as well as extional dyspnea. The investigators have previously observed that NPV used as an adjuvant to pulmonary rehabilitation improves lung function, exercise capacity, and reduces exacerbations. The investigators now sought to determine whether long-term maintenance NPV improves long-term clinical outcomes and reduces mortality in COPD.
Inspiratory muscle training has been an important part of pulmonary rehabilitation program directed at patients with COPD. It can increase respiratory muscle strength, relieve dyspnea ,improve the quality of life in COPD patients. However, there is no uniform standard for the intensity of inspiratory muscle training. By comparing a series of indexes, such as maximal inspiratory pressure, maximal expiratory pressure, degree of dyspnea and exercise capacity before and after the training under different intensity, a large number of literatures have explored the appropriate intensity of inspiratory muscle training. But to date, there are few studies about the effects of different intensity of inspiratory muscle training on respiratory physiological mechanism. It has been shown that inspiratory muscle training may be more beneficial to improve the pulmonary rehabilitation effect of COPD patients with inspiratory muscle weakness. So it is not clear whether there is a difference in respiratory physiology between patients with normal inspiratory muscle strength and those with lower inspiratory muscle strength. Respiratory central drive, as an important physiological index, which can be reflected by minute ventilation volume, mouth pressure, mean inspiratory flow and diaphragm electromyography,is closely related to the symptoms and the severity of the disease.Therefore,the purpose of this study was to investigate the changes of respiratory mechanics and central drive in COPD patients at different inspiratory loads, and at the same loads between patients with and without respiratory muscle weakness.That can provide more evidential evidence for setting up the intensity of inspiratory muscle training.
The study is a two-part small scale, open-label, pilot study to evaluate feasibility and proof-of-concept for a respiratory assist medical device. The study population will consist of severe Chronic Obstructive Pulmonary Disease (COPD) subjects.
To establish the feasibility of stopping inhaled steroids and switching or maintaining dual bronchodilation in one visit - in the real world, for people with COPD.
Chronic obstructive pulmonary disease (COPD) is a highly prevalent condition worldwide and is a cause of substantial morbidity and mortality. Unfortunately, few therapies have been shown to improve survival. The importance of systemic effects and co-morbidities in COPD has garnered attention based on the observation that many patients with COPD die from causes other than respiratory failure, including a large proportion from cardiovascular causes. Recently, two high profile randomized trials have shown substantial improvements in morbidity and mortality with use of nocturnal non-invasive ventilation (NIV) in COPD patients with hypercapnia. Although the mechanisms by which NIV improves outcomes remain unclear, the important benefits of NIV might be cardiovascular via a number of mechanisms. In contrast to prior trials of NIV in COPD that did not show substantial benefit, a distinguishing feature of these encouraging recent NIV clinical trials was a prominent reduction of hypercapnia, which might be a maker or mediator of effective therapy. Alternatively, improvements might be best achieved by targeting a different physiological measure. Additional mechanistic data are therefore needed to inform future trials and achieve maximal benefit of NIV. Recent work in cardiovascular biomarkers has identified high-sensitivity troponin to have substantial ability to determine cardiovascular stress in a variety of conditions - even with only small changes. In COPD, a number of observational studies have shown that high-sensitivity troponin increases with worsening disease severity, and that levels increase overnight during sleep. This biomarker therefore presents a promising means to study causal pathways regarding the effect of NIV in patients with COPD. With this background, the investigator's overall goals are: 1) To determine whether the beneficial effect of non-invasive ventilation might be due to a reduction in cardiovascular stress, using established cardiovascular biomarkers, and 2) To define whether a reduction in PaCO2 (or alternative mechanism) is associated with such an effect.